13287722 has 12 divisors (see below), whose sum is σ = 23185890. Its totient is φ = 5694696.

The previous prime is 13287697. The next prime is 13287737. The reversal of 13287722 is 22778231.

It can be written as a sum of positive squares in only one way, i.e., 7722841 + 5564881 = 2779^2 + 2359^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67697 + ... + 67892.

Almost surely, 2^13287722 is an apocalyptic number.

13287722 is a deficient number, since it is larger than the sum of its proper divisors (9898168).

13287722 is a wasteful number, since it uses less digits than its factorization.

13287722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135605 (or 135598 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 13287722 is about 3645.2327772037. The cubic root of 13287722 is about 236.8555203127.

The spelling of 13287722 in words is "thirteen million, two hundred eighty-seven thousand, seven hundred twenty-two".